Concrete-mixer.



T. L. SMITH.

CONCRETE MIXER. APPLIOATION HLBD Nov. z; 1906.

Patented Apr. 15,1913.

o o no@ o o ooo narran srArEs PATENT orrion.

THMAS L. SMILTH, 0F JILWAUKEIE, 'WISONSLM ASSIGNOR T0 THE T. I. SMITH- CO-MPANY., 0F MILWAUKEE, WISCNSXN, A i'QORQIOBABIIQN' 0F WSCONSIN.

comentan-Mixen.

applicati@ area November 2, reos. serial No. 341,792.

To all whom @'15 may concern.'

Be it known that I, THoMAs L. SMITH,l

of Milwaukee, in the county of Milwaukee and State of Wisconsin, have vinvented a new and useful Improvement in ConcretelMiX- ers, of which the following is a specification.,

My invention relates to improvements in concrete mixing machines, in which a rotating drum is employed, and which is tilted to j discharge, and the object of my improve-` ment is to increase the durability of the leed l spout, which necessarily remains stationaryl in the feed end of the revolving drum, by providing adequate supports and adjustments to maintain the spout free from wearing contact with the revolving drum. I atg tain this objectv by the various features of; construction shown in the accompanying drawing, which is hereby made a part of:

. work could generally 'be done by the conthis application, and. in which.-

Figure l is a vertical Isection taken through the center and lengthwise of the mixing drum, the feed spout with its sup. guide rollers being ports, and the lower shown in elevation. lFig. 2 is a .section through the spout adjustino device, taken on the line 2 2, of Fig. .1. ig. 3 is a detail view of one of the guy rods and its connec- 'tions with the frame and the spout.

Similar letters refer to the saine parts throughout the several views. i lt will be understood that the machine herein shown is the same machine, with slight modifications, as .the 'one shown in my Patent No. 690788, J an. 7, 1902, and as the various details of supporting, driving, and tilting the drum do not differ therefrom they are shown in dotted lines only.

ln the. drawing A is the revolving drum,

composed of the two conical steel plate pori tions a, a, riileted to the central gear ring al. The teeth, a2, of this gear ring are the means by which the drum is rotated, and it is sulpf ported entirely by rollers mounted in t e trunnioned tiltable frame portion, B, said rollers engaging the sides of the ring, as at a3. ln the present illustration, onlytwoof these guide rollers` Z), l), are shown.

a5, a, are the mixing blades, which are attached to the interior of the drum. As the drum revolves, these blades throw the'material to be mixed back and forth across the central transverse planeet the drum, and alsolift the material and let it fall to an- Qther peripheral portion of the drum.

The .material of which concrete is conip'osed consists frequently of sharp crushed stone, sharp sand and cement. The continual movement of the material, particularly of the sharp stone, is wearing on the steel plates of the drum. This wearing is destructive of the drum at its larger dianieter near the cast gear ring, where the stone falls the greatest distance from the blades. When lthe drum is perforated or materially weakened hy this constant wear, entire reconstruction of the drum is necessitated, and owing to the peculiar shape of the drum, and the fact that it must run true, this re construction cannot he satisfactorily effected, away from the factory where it was made. I have therefore devised the wear plates, a, which can be riveted in the drum 1n any blacksmith shop, and in fact this tractorjhimself. It will be understood that these plates o5 are not so much strengthenmg :plates as they are wear plates. Whenever they are Worn very thin or worn through, therivets which hold these plates, and nothing but these plates, should be out out and new plates substituted for the old ones. It will be noted that it is not necessary or these wear plates to lit the drum nicely; it is only essential to have the rivets tightin the holespin the drum, to prevent leakage.

a isa ring or flange, extending in a plane at right angles to the axis of the drum, and secured in place by a series of small brackets, riveted to the drum and ring.

The drum of .this machine is discharged `by tilting it hv means of the trunnion mounted tilttlblc traine B to an angle ,of degrees to the horizontal, while it is revolving. `When the drum is tilted hack into horizontal position, a little of the more fluid part of the mortar rims down the outside of the drum, and would eventually .gety ontthe guiding and supporting faces ofthe gear ring. Thedrip ring, a9, intercepts this fluid mortar creeping along the exterior of the drum,'and the mortar drips harmlessly from the periphery of this ring. The guiding and supporting rollers and the drum gear ring arel thus protectcdfroin the clogging and wearing act-ion of the mortar.

The hopper and spout, D, is the means by which the material., crushed stone, sand, cement and water, is introduced to the retween said volving drum, A. This spout is s ppor'ted from the frame, B, by means of uy rods, Z1 d?, shown in dotted lines, and the braces, Z2 (Z2, pivoted to the frame at d, and the spout at d4.

Z5 is a 'cross bar, riveted to the braces d2. The stud, lndlich is riveted to the spout, engages the cross bar (Z5, by means of the clamping nuts. The set screws, d8, tapped into the cross bar, d5, also help to support the spout D, in its adjusted position reila tivo to the braces cl2. By means of the stud al, and clamping nuts, dl, the drum entering end of the spout may be adjusted in the drum opening, by swinging it slightly in a vertical plane around the pivot at d4. The stud, cl and the horizontal pivot at d* 'prevent thefspout getting out of position laterally. e

Asthesemachines are generally used in the construction of bridges, dams, piers, and various kinds of field Work, remote trom repair shops, and as they are subjected to very rough treatment, all improvements tending to increase their durability become important.

What I claim is,*

1. In a concrete mixer a frame, a drum rotatably mounted therein, a feed spout entering said drum, braces pivoted to the bottom of said frame and to the top of said spout, adjustable guy rods connected to the top of said frame and to said spout, and adjusting and securing means engaging bebraces and the lower portion of said spout.

2. A concrete mixer, comprising a frame,

a drum rotatably mounted thereon, a feed spout entering said drum, braces connected to said frame and pivoted toJ said spout., guy rods connected to the frame and to said spout., and adjusting means between the braces and the spout.

3. A concrete mixer, comprising a frame, a drum rotatably mounted thereon, a feed spout entering said drum, braces connected t0 the frame and pivoted to the feed spout, a cross bar connecting the braces, a stud on the feed spout passing through an opening in the cross bar, and nuts threaded ou the stud andengaging the opposite sides of theA cross bar whereby the position of the teed spout may be adjusted with relation to the opening of the drum.

4. A concrete mixer, comprising fi trame. a drum rotatably mounted thereon, a. feed spout entering scaid drum, braces connected to the frame and pivoted to the spout, a cross bar connecting the braces, a stud 1 the feed spout passing through an opening,T of the cross bar, nuts threaded on the stud and bearing on opposite sides of the cross bar whereby the feed spout may be Ladj usted with relation to the opening of the drum, and set 'screws threaded in the cross bar and bearing on the feed spout to steady it in its adjusted positions.

In testimony Whereof, I have signed my name to this specification in the presence of tivo Witnesses.

THOMAS L. SMITH. Witnesses:

CHARLES F. SMITH, F. B. MARSHALL. 

